For sale are two back weights (14g and 18g, standard is 16g) and one center weight (6g, standard is 4g) for the TaylorMade SIM2 driver, along with the corresponding wrench. I purchased these new but hardly used them, so they are in good condition. It might be fun to experiment with these on your SIM2 driver. Please note that these are not compatible with the SIM2 MAX-D driver.